I don’t know Joe Cadillic manages to track all this stuff, but bless him for doing so:
Police are using DHS’s Electronic Recovery and Access to Data (ERAD) reader to spy on your credit, debit, commuter train and bus card balances without a WARRANT!
“The ERAD Prepaid Card Reader is a small, handheld device that uses wireless connectivity to allow law enforcement officers in the field to check the balance of cards. This allows for identification of suspicious prepaid cards and the ability to put a temporary hold on the linked funds until a full investigation can be completed.”
Read more on MassPrivateI.